Which listings specifically are you referring to? Most people here bought the kits from ADATA, Kingston, or Innodisk. I haven't seen those advertised as "Registered" yet myself. All of those are Unbuffered, only some (like the Innodisk, Crucial and V-Color kits) are Unbuffered ECC. Registered DIMMs won't work on virtually all consumer boards.

Tell us what kind of memory you're looking for, maybe I can help you. I got a list of links somewhere

I believe that the v-color sticks that sometimes get mentioned are incorrectly listed in some places as registered, but in fact are not. There are many ecc udimms that are listed, which should work correctly with decent amd boards (with ecc enabled), and probably should run fine on intel boards with ecc not enabled (since intel reserve support for ecc to their xeon chips, or at least they did).

I have also seen bad recommentdations from others, and there is an optimum tech video (of the black ridge cooler, iirc) that links to vlp rdimms that won't work for the vast majority of consumer boards, so it is a mistake or oversight that is often made.

Registered memory is reserved for servers, typically. Support is required from the motherboard as much as it is from the cpu chip itself. The reason you would want to use it is to have a higher capacity of ram, since it doesn't stress the memory controller as much. On the AMD side of things, it's something that you'll only find on the epyc stuff, as it isn't supported on threadripper. I'm not sure about intel, but it almost certainly isn't available on the standard i7/i9 series of cpus and their motherboards.

Caliper Novice

Reg and ECC. X99 boards work with Xeon E5-v3 and E5-v4 processors, that are widely available on ebay. Even though it's a bit older generation, you can pick up 12 core CPU for under $200.
I believe some of i7 models work with Reg Ecc ram too. That's not very helpful unless you already have such CPU: it's cheaper to get new Xeon rather then hunt for specific i7 CPU.

have you tried to run them at lower voltage? i have same C-die but they are OEM Samsung 2x16GB currently running at 1.28v 3066mhz 1T 16-18-18-38-56 i would like to try your tight timings but i'm scare of that 1.360v for Samsung C-die

Case Bender

have you tried to run them at lower voltage? i have same C-die but they are OEM Samsung 2x16GB currently running at 1.28v 3066mhz 1T 16-18-18-38-56 i would like to try your tight timings but i'm scare of that 1.360v for Samsung C-die

Case Bender

I received them yesterday! I'm waiting on my new PSU to arrive (today or tomorrow) before I continue on and test them. Will provide more details when I get it up and running. My nf-a12x15 won't be here until Monday unfortunately.

Average Stuffer

Chassis Packer

Hey everyone, I've been testing several VLP kits lately on the search for the best option for my system (and out of fascination, they're cool and niche). I figured I should tell this thread about my experience.

The Athlon should approximately represent your average Zen1 and Zen+ memory controller and its limits, whereas the 3600 is obviously much more capable in every regard and can unlock the true limits of these ram sticks. The Strix B450-I motherboard is generally regarded one of the best options for memory overclocking on Ryzen and shouldn't be the limiting factor in most cases.

The modules use memory chips by Nanya Technology, specifically their first 8Gbit die revision, A-Die. Nanya only entered the DDR4 market in 2019 and reviews of this die are scarce and hard to find. Everything I've found points towards respectable overclocking headroom, around the 3400-3800MT/s mark. Thats sufficient for Ryzen.

On my 200GE, I ended up getting these up to

Frequency​

Voltage​

tCL-tRCDRD-tRCDWR-tRP-tRAS​

note​

3666MT/s​

1.45V​

16-17-18-21-36​

​

3600MT/s​

1.35V​

16-17-18-21-36​

​

3466MT/s​

1.28V​

16-17-18-21-36​

​

3200MT/s​

1.20V​

16-17-18-21-36​

​

There might have been more potential in those timings at lower frequency, but I stuck to 3600MT/s so I didnt really care about that.

On my Ryzen 3600, I curiously had to change the tRCDRD timing to achieve stability

Frequency​

Voltage​

tCL-tRCDRD-tRCDWR-tRP-tRAS​

note​

3600MT/s​

1.35V​

16-19-10-21-37​

​

3800MT/s​

1.35V​

18-19-20-15-38​

​

Higher frequencies did boot but threw errors quickly. Not sure if I'd be able to stabilize them.

Overall I'm happy with the results of this memory kit, I ended up recommending my 3600MT/s settings to someone else on Discord and they seemed to work there as well. Can recommend.

These modules uses memory chips by SK Hynix, namely their second latest 8Gbit die revision, commonly referred to as CJR. They're great ICs, can be found on many 3600MHz 16-19-19-39 or 3600MHz 18-22-22-42 retail kits. They may have overclocking headroom between 3600CL16 and >4000MT/s CL18, from what I've seen.
They're also the same ICs as those found on ADATA VLP modules recently, from what I've gathered.
A thing to note here is that -AURMEND- got this same kit with Hynix AFR ICs. Those are inferior dies on average, usually reaching between 3200 and 3600MT/s at most. The amazon seller that I got these from also sells a 2400MT/s module, which according to the low-quality product picture and amazon user reviews contains Samsung dies (B-Die, it seems).

On my 200GE, this kit capped out at around 3333MHz. Their dual rank nature is simply too taxing for weak memory controllers.

On my Ryzen 3600, they got a lot further

Frequency​

Voltage​

tCL-tRCDRD-tRCDWR-tRP-tRAS​

note​

4000MT/s​

1.40V​

18-19-10-21-21​

​

3800MT/s​

1.45V​

16-19-10-21-21​

​

3600MT/s​

1.40V​

16-17-10-19-21​

​

I'm highly impressed with these modules, I think I got lucky. The ECC functionality doesnt appear to reduce performance and can be disabled in the BIOS.

These EUDIMMs contain Samsung C-Die chips (detected via their ...C-BCTD code on the ICs). Those are known to be some pretty bad ICs. They have low voltage tolerance and scale negatively with voltage past a certain point. They can be found on recent Corsair v4.32 3200C16 and I believe 3600C19 kits. Some reports suggest they can clock rather high with loose timings, but only at low-ish voltage.

On my 200GE, they achieved no greater than 3266MT/s at lame timings (16-17-10-20-40 IIRC)

On my Ryzen 3600, I did get to push them further

Frequency​

Voltage​

tCL-tRCDRD-tRCDWR-tRP-tRAS​

note​

3200MT/s​

1.24V​

16-17-10-18-33​

​

3600MT/s​

1.28V​

18-21-21-22-42​

​

3800MT/s​

1.24V​

20-21-21-22-42​

-boot issues-​

Anything between 3666 and 3800 might be stable, but demand higher voltage for tCL 16 so I stopped. 3800 had issues where it oftentimes didn't boot successfully, which could probably be stabilized with more effort, but its timings are super loose already so I won't bother.

These sticks are the worst performing ones out of the three. Based on this individual experience I wouldn't recommend them in case there are other options available.

Conclusion:

Kingston OC: 3600C16 or 3800C18

V-Color OC: 3600C16, 3800C16 or 4000C18

Innodisk OC: 3600C18

The VLP DDR4 DRAM options on the market right now appear to have respectable potential. Western users are no longer restricted to uncertain purchases from South East Asia, like it used to be until mid 2019. I wouldn't hesistate to pick V-Color modules or Crucial's CT16G4XFD8266 over the Innodisk modules.

I hope this will be helpful to some. I know my testing wasn't perfectly consistent or perfectly thorough (you'd typically want to run an overnight ram test for every setting), but this should be fine in terms of giving some form of indication.

I have also decided to compile this spreadsheet for information about VLP DDR4, with reported overclocks I could find on here, on Reddit and on Discord.

Trash Compacter

I have the same sticks. I just checked and mine have the same codes printed on the chips as in your photo, although thaiphoon burner reports it as b-die.

I have also been unable to hit 3600C16 with these sticks, in the end I settled with 3600-18-19-18-38 at 1.35V (Ryzen 3700x, x570 chipset). I thought it was probably just my unwillingness to set the voltage any higher, but not actually being b-die could also explain things.

Any idea why there would be a mismatch between what's printed on the ICs and what they are reporting as?

Chassis Packer

That would be because the manufacturer didn't care to reprogram the SPD chips after switching from working with B-Die chips to working with C-Die, or it's just a simple oversight. That SPD chip doesn't actually read info about the memory, it is only there to be read.

With my modules, voltage at 1.35 was actually counterproductive, I had better luck staying as low as possible. I've also read an account of a user killing multiple C-Die DIMMs after half a year at 1.35V, so it's absolutely a good idea to keep voltage low.

The IMC isn't harmed by this, no. The IMC cares very little about DRAM voltage in general, and I didn't need to raise SOC or VDDP for this at all. If anything, the ram modules themselves would be the ones getting harmed by dram voltage, but 1.45V is generally regarded as the safe limit for Hynix CJR.
1.40V isn't high, it's just 50mV above what most XMP kits run at.

Only thing I would be concerned about in this case is temperature, since they don't have heatspreaders and live in a restricted environment now, high temps can potentially lead to instability. I'll keep an eye on that

Chassis Packer

Ah...I'm planning on using the Black Ridge with a downfiring 120mm fan (something I expect a lot of people here are aiming for, or something similar given the relatively limited need for something smaller than an IO shield), so I imagine temps would stay relatively cool as long as the CPU can also stay cool, since air will constantly be moving over the RAM modules.